MEMSET(3) Linux Programmer's Manual MEMSET(3)

memset - fill memory with a constant byte

#include <string.h>
void *memset(void *s, int c, size_t n);

The memset() function fills the first n bytes of the memory area pointed to by s with the constant byte c.

The memset() function returns a pointer to the memory area s.

For an explanation of the terms used in this section, see attributes(7).
Interface Attribute Value
memset () Thread safety MT-Safe

POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.

bstring(3), bzero(3), swab(3), wmemset(3)
2017-03-13 GNU